Q: Is 1,355,661 a Prime Number?
A: No, 1,355,661 is not a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 1355661 can be evenly divided by 1 3 9 31 43 93 113 129 279 339 387 1,017 1,333 3,503 3,999 4,859 10,509 11,997 14,577 31,527 43,731 150,629 451,887 and 1,355,661, with no remainder.
Since 1,355,661 cannot be divided by just 1 and 1,355,661, it is not a prime number.